Could Fuel Injector Cleaning cause a P0171?
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Could Fuel Injector Cleaning cause a P0171?
I took my 4Runner to the dealer for an alignment, brake adjust and to have them re-adjust the belts from my timing belt service (they accesory belts were slipping a bit because the tension wasn't locked down properly)
Anyway - the recommend a fuel injector cleaning service for $149, I talked her down to $109 and had them do it.
The truck does run smoother now, but 2 days later I threw a P0171 code.
I pulled the sensor and cleaned it with electrical cleaner and the next day the code came back again.
I'm wondering if thier cleaning service could have damaged my MAF, apparently it's a combination of fuel additive and having some stuff sprayed directly into my intake. I'm not sure if they removed the airbox or not for this, but it wasn't apparent that they did, because when I removed it, there were no marks on the dusty underside to show it was removed.
I'm not one to complain about a $100 R&R part, but I would be pissed if the dealer contributed to the death of my maf with some harsh cleaners, as they seem to think a barely oiled K&N filter can easily destroy one, why not harsh cleaning chemicals
BTW - K&N has PROVEN that it's oil won't harm MAFS.
http://knfilters.com/MAF/MAFTestresults.htm
Any comments would be helpful
Rook
Anyway - the recommend a fuel injector cleaning service for $149, I talked her down to $109 and had them do it.
The truck does run smoother now, but 2 days later I threw a P0171 code.
I pulled the sensor and cleaned it with electrical cleaner and the next day the code came back again.
I'm wondering if thier cleaning service could have damaged my MAF, apparently it's a combination of fuel additive and having some stuff sprayed directly into my intake. I'm not sure if they removed the airbox or not for this, but it wasn't apparent that they did, because when I removed it, there were no marks on the dusty underside to show it was removed.
I'm not one to complain about a $100 R&R part, but I would be pissed if the dealer contributed to the death of my maf with some harsh cleaners, as they seem to think a barely oiled K&N filter can easily destroy one, why not harsh cleaning chemicals
BTW - K&N has PROVEN that it's oil won't harm MAFS.
http://knfilters.com/MAF/MAFTestresults.htm
Any comments would be helpful
Rook
Last edited by Rookie; 09-12-2007 at 06:28 AM.
#2
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I doubt it. Most fuel injector services involve adding something to the fuel tank, and an induction service which adds a cleaner to the intake, usually through a vacuum line into the intake plenum or maybe an induction tool which feeds into the throttle body. Either way, that's nowhere near the MAF.
Now, if they actually cleaned the MAF itself, that could be the problem.
Now, if they actually cleaned the MAF itself, that could be the problem.
#3
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My bet is on an air leak somewhere between your MAF and throttle body. My GF's taco had the same code for awhile and I found that the vacuum line from the FMU had a crack in it. Replaced the line and all is better again.
Check for air leaks by spraying brake cleaner around suspect areas with the truck running. If the idle increases when you spray a particular area, that will be where your leak is.
Check for air leaks by spraying brake cleaner around suspect areas with the truck running. If the idle increases when you spray a particular area, that will be where your leak is.
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Pulled the MAF again and gave it a more thorough cleaning, code hasn't come back for a week. May have been a loose hose or the intial cleaning left some film on the sensor, either way - all looks good now.
Rook
Rook
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David
#7
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Injector cleaning is usually done by hooking up the cleaning system to the fuel rail or filter, and not opening anything up in the intake.
I'd just throw a new MAF at the truck and be done with p0171 for a few years more...
I'd just throw a new MAF at the truck and be done with p0171 for a few years more...
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